Q345B kare gatu se yon lontan fè pati ak yon ti kras seksyon Et pa joints sou bò a.Steel pipes have a hollow section and are used in large quantities as pipelines for conveying fluids, such as pipelines for conveying oil, natural gas, gas, water and certain solid materials. Compared with solid steel such as round steel, steel pipe is lighter when the bending and torsion strength is the same. Li se yon jan de cross-section stèm ekonomik, ki se larèy itilize nan pwodwi a de pati structural ak pati mechanik, tankou dlo sistèm lwil fif, shafts automobil transmission Et bisiklèt.Ankadreman ak nwa itilize nan konstriksyon kay.
